Search notes:

Registry: HKEY_CURRENT_USER\Software\Microsoft\Office\Common

Values

Values I've seen under HKEY_CURRENT_USER\Software\Microsoft\Office\Common include:

FontBmpCache (A path pointing to a file like C:\Users\username\AppData\Romaing\Microsoft\Office\….tmp)
UID (A GUID?)
UserName

Subkeys I've seen include